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Question

When a ray of light passes through a rectangular glass block, the direction of emergent ray is .......... to the incident ray.
  1. perpendicular
  2. parallel
  3. tangential
  4. None

A
None
B
parallel
C
tangential
D
perpendicular
Solution
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When a ray of light passes through a rectangular glass block, the direction of emergent ray is parallel to the incident ray as shown in the figure.
566612_282486_ans_d4a99c374d424c0c8088cc949f3f0693.png

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